Automatic reconstitution for dual chamber syringe
First Claim
1. A syringe having a longitudinal axis, the syringe comprising:
- a delivery plunger; and
a needle;
an automatic mixing device including;
a mixing device including;
an inner barrel including a wall and defining an inner chamber, the delivery plunger being axially movable within the inner chamber;
an outer barrel in a substantially coaxial relationship with the inner barrel, the outer barrel defining an outer chamber radially between the outer barrel and the inner barrel;
a passage formed through the wall of the inner barrel and providing communication between the outer chamber and the inner chamber; and
a mixing plunger axially moveable within the outer chamber; and
an actuating device removably mounted to the mixing device, the actuating device including;
a housing releasably connected to the mixing device;
a trigger member configured in an initially locked state to the housing;
a sleeve engaged with the mixing plunger of the mixing device; and
a biasing member disposed in an energized state between the housing and the sleeve;
wherein the trigger member is rotatable around the longitudinal axis to unlock the trigger member from the housing to place the trigger member in an unlocked state, the trigger member being axially operable to release the biasing member to de-energize to axially move the mixing plunger within the outer chamber to thereby urge contents of the outer chamber through the passage into the inner chamber.
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0 Petitions
Accused Products
Abstract
An automatic mixing device, an actuating device removably mounted to the automatic mixing device and a retractable syringe having the automatic mixing device are provided. The actuating device has an initially compressed spring and a trigger member that initiates spring decompression to drive depression of a mixing plunger of the automatic mixing device. A seal located in the outer chamber is capable of axial movement upon depression of the mixing plunger, from a first position in sealing engagement with one or more apertures in an inner barrel to a second position intermediate the apertures and vents in an outer barrel. This allows depression of the mixing plunger to force a first substance from the outer chamber through the apertures to mix with a second substance in an inner chamber of the inner barrel. The mixed substance in the inner barrel is then delivered by the syringe with subsequent needle retraction.
58 Citations
26 Claims
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1. A syringe having a longitudinal axis, the syringe comprising:
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a delivery plunger; and a needle; an automatic mixing device including; a mixing device including; an inner barrel including a wall and defining an inner chamber, the delivery plunger being axially movable within the inner chamber; an outer barrel in a substantially coaxial relationship with the inner barrel, the outer barrel defining an outer chamber radially between the outer barrel and the inner barrel; a passage formed through the wall of the inner barrel and providing communication between the outer chamber and the inner chamber; and a mixing plunger axially moveable within the outer chamber; and an actuating device removably mounted to the mixing device, the actuating device including; a housing releasably connected to the mixing device; a trigger member configured in an initially locked state to the housing; a sleeve engaged with the mixing plunger of the mixing device; and a biasing member disposed in an energized state between the housing and the sleeve; wherein the trigger member is rotatable around the longitudinal axis to unlock the trigger member from the housing to place the trigger member in an unlocked state, the trigger member being axially operable to release the biasing member to de-energize to axially move the mixing plunger within the outer chamber to thereby urge contents of the outer chamber through the passage into the inner chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification